A. It's killing me. B. dentists C. You have already delayed too long. D. I'm not feeling so good. E. since yesterday morning. A: Hey, big brother. You don't look well today. B: ##1## A: What's the matter with you? B: I've had a bad toothache. ##2## A: How long have you been feeling like that? B: I have been feeling like this ##3## A: In that case, I suggest you go to see the doctor right now. B: I think so, but ... A: Shall I go to the dentist's with you? B: That's great. I'm most afraid of the##4##. That's why I am still here. A: I think you have to go in your case. ##5## B: I think so.